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SCHOTTKY RECTIFIER
Bulletin PD-2.327 rev. C 11/02
SD51
60 Amp
Major Ratings and Characteristics
Characteristics
SD51... Units
IF(AV) Rectangular
waveform
VRRM
IFSM @ 60Hz
60 A
45 V
800 A
VF @120Apk,TJ=150°C
0.75
V
TJ - 65 to 150 °C
Description/ Features
TO-203AB (DO-5)
The SD51 Schottky rectifier has been optimized for very low
forward voltage drop, with moderate leakage. The propri-
etary barrier technology allows for reliable operation up to
150° C junction temperature. Typical applications are in
switching power supplies, converters, free-wheeling diodes,
and reverse battery protection.
150° C TJ operation
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Hermetic packaging
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Conforms to JEDEC Outline DO-203AB (DO-5)
Dimensions in millimeters and (inches)
1

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SD51
Bulletin PD-2.327 rev. C 11/02
Voltage Ratings
Part number
VR Max. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
(1) For SD51 VRWM and VRRM = 45V @ TJ = 25°C , =35V @ TJ = 150°C
SD51
45
(1)
Absolute Maximum Ratings
Parameters
IF(AV) Max. Average Forward Current
* See Fig. 5
SD51 Units
Conditions
60 A 50% duty cycle @ TC = 90°C, rectangular wave form
IFSM Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
800
A 60Hz half cycle sine wave
or 5ms rectangular pulse
Following any rated
load condition and
with rated VRRM applied
Electrical Specifications
Parameters
VFM Max. Forward Voltage Drop
* See Fig. 1
(2)
IRM Max. Reverse Leakage Current (2)
* See Fig. 2
CT Max. Junction Capacitance
LS Typical Series Inductance
dv/dt Max. Voltage Rate of Change
(Rated VR)
(2) Pulse Width < 300µs, Duty Cycle < 2%
SD51 Units
Conditions
0.58
0.66
0.86
0.75
50
200
2900
7.5
10000
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 35A
@ 60A
@ 120A
TJ = 25 °C
@ 120A
TJ = 150 °C
TJ = 25 °C
TJ = 125 °C
VR = rated VR
VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
Measured from top of terminal to mounting plane
Thermal-Mechanical Specifications
Parameters
SD51 Units
Conditions
TJ Max. Junction Temperature Range
Tstg Max. Storage Temperature Range
RthJC Max. Thermal Resistance Junction
to Case
-65 to 150 °C
-65 to 150 °C
1.0 °C/W
DC operation
* See Fig. 4
RthCS Typical Thermal Resistance, Case to
Heatsink
0.25
°C/W Mounting surface , smooth and greased
wt Approximate Weight
15 (0.53) g (oz.)
T MountingTorque
Min.
Max.
23 (20) Kg-cm Non-lubricatedthreads
46 (40) (Ibf-in)
Case Style
DO-203AB(DO-5) JEDEC
* For Additional Informations and Graphs, Please See the 50HQ Series
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1000
100
10
TJ=150°C
TJ= 25°C
SD51
Bulletin PD-2.327 rev. C 11/02
1000
100
TJ=150°C
125°C
10 100°C
75°C
1
50°C
.1
25°C
.01
0 5 10 15 20 25 30 35 40 45
ReverseVoltage- VR (V)
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
10000
TJ=25°C
1
.1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2 1.3 1.4
ForwardVoltageDrop- VFM(V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
10
1000
0
10 20 30 40 50
ReverseVoltage- VR(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
1 D=0.50
D=0.33
D=0.25
D=0.17
.1 D=0.08
.01
.00001
SinglePulse
(Thermal Resistance)
.0001
.001
.01
PDM
t1
t2
Notes:
1. DutyfactorD= t1/t 2
2. PeakTJ=PDMxZthJC+TC
.1 1 10 100
t1, RectangularPulseDuration(Seconds)
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics
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SD51
Bulletin PD-2.327 rev. C 11/02
160
120
SD51
RthJC (DC)=1.0°C/W
DC
80
40
0
0 10 20 30 40 50 60 70 80 90
AverageForwardCurrent -IF(AV) (A)
Fig. 5 - Maximum Allovable Case Temperature
Vs. Average Forward Current
10000
300
250
200
150
100
DC
50
0
0 40 80 120 160 200
AverageForwardCurrent -IF(AV) (A)
Fig. 6 - Forward Power Loss Characteristics
1000
At AnyRatedLoadCondition
AndWithRatedVRRMApplied
FollowingSurge
100
10
100
1000
10000
SquareWavePulseDuration- tp (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current
Data and specifications subject to change without notice.
This product has been designed for Industrial Level.
Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 11/02
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